JPS6351568A - Construction of concrete structure and support member - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a method for constructing a concrete structure in which a work scaffolding framework, which also serves as a frame for formwork, is sequentially moved up and down using the external wall of a concrete structure cast in advance as support. and a support member.

(Conventional technology) The construction of work scaffolding frameworks for formwork work, etc. used for concrete structures such as external walls of general building structures and bridge piers, requires the use of large lifting equipment such as tower cranes. This, together with the unloading of reinforcing bars, construction materials, etc., contributed to the overcrowding of the lifting plan.

This is especially true if the stockyard for construction materials is small, creating a demand for proactive efforts to reduce lifting loads.

To this end, conventionally, in a pre-cast concrete structure, several anchor members were attached vertically to the pedestal support of the scaffolding frame, and a support +1 was provided which was fixed in the vertical direction by these anchor members. They then climbed onto these pillars to support the scaffolding framework.

Moving the scaffolding framework to the next step (2) does not require the use of a crane, as the pillars are lifted up using chain blocks or the like suspended from an upper anchor member. For example, there was the Official Publication No. 57-33669.

In this scaffolding framework, in order to ensure the direction of movement,
The length of the pillars is so long that it spans at least three floors. Therefore, since it is relatively heavy, the branch is made into a sheath structure, and the auxiliary column is inserted through the hollow in the axial direction.The auxiliary branch is made as long as before, and the column part of the sheath structure is By making it short and fixing it to the frame of the scaffolding framework, it is possible to easily move the scaffolding framework along the support, and the weight of the support is also reduced.

However, the auxiliary support is still long, and since it is 1゜ long, it is heavy and difficult to handle. I will be beaten. In addition, there was a drawback that it took a lot of time and effort to separate the anchor parts (14) for the Brown 1-1 anchors that received the auxiliary supports and the anchor parts 14 that received the scaffolding framework.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a method for constructing a concrete structure in which a scaffolding framework can be easily moved to the next process by simple lifting without using supports. For this purpose, the most suitable pedestal support is to provide a support member such as an anchor member.

(Measures to Solve the Problems [2] In order to achieve the above object, the method for constructing a concrete structure according to the present invention includes a concrete formwork, a scaffolding framework capable of supporting the same, and a pre-cast concrete structure. A concrete structure that is equipped with a metal fitting that can be fixed to the exterior wall surface of a building and a locking metal fitting that is integrally fixed to the scaffolding framework and can be locked to the anchor metal fitting, and that has just finished concrete pouring. Fix the anchor fittings to the top of the object, attach the mobile lift to it, lock the lifting wire of the portable lifting machine to the system locking fittings of the scaffolding framework, and then attach the scaffolding with the concrete formwork. The framework is hoisted up as far as necessary to the next concrete placement position, and the locking metal fittings of the scaffolding framework are locked to the anchor metal fittings.Then, the hrr m machine is removed from the anchor metal fittings, and the concrete formwork on the scaffolding framework is lifted up. 1) Place concrete in a predetermined position, and repeat these steps to construct a concrete structure upwards.

The supporting member for supporting the scaffolding framework on the outer wall surface of the Boncrete structure is made up of the anchor fittings, the locking fittings, etc., and has the following components.

(a) The locking metal fittings shall be integrally fixed to the side edges of the scaffolding framework.

(b) The locking metal fitting has a guide notch that gradually expands downward and opens downward.

(c) The anchor fittings shall have bolt holes that can be attached and detached to anchor bolts installed in the concrete structure.

(d) The anchor fitting shall be provided with a bearing piece that projects in a direction away from the outer surface of the concrete structure.

(e) The support piece of the anchor fitting is removably provided with a support shaft that locks in the guide notch of the locking metal fitting and supports the locking metal fitting.

(f) A guide piece is provided inside the support piece of the anchor metal fitting to guide the locking metal fitting to the inside of the support piece.

(g> Provide a U-shaped support groove cut out from above in the anchor fitting to rotatably support the column of the lifting machine.

(Function) Pass the hole I of the anchor fitting through the hole I of the anchor fitting through the anchor bolts which are lined up vertically and buried in the outer wall of the concrete structure in advance, tighten the nut and screw the anchor fitting onto the wall surface (above). to be fixed.

Next, the support shaft is attached to the support piece of the anchor metal fitting, and the scaffolding framework is lowered onto the anchor metal fitting from above, but when doing so, the locking metal fitting is lowered along the guide piece of the anchor metal fitting. The support shaft is accommodated along the notch edge of the guide notch of the locking fitting and on the upper edge thereof.

That is, the scaffolding framework is supported on the outer wall side of the concrete structure by engaging the locking metal fittings with the anchor metal fittings.

Contrary to the above setup, if the scaffolding framework is lifted upward, the guide notch of the locking fitting is open at the bottom, so the scaffolding framework can be detached from the anchoring fitting as it is. Then, using a relatively small and portable lifting device such as a chain block or jack supported by an anchor fitting provided below, the scaffolding framework is lifted to a position suitable for the next process.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Figures 1 to 3 sequentially show the construction method of concrete structure 1, and Figure 1 shows the completion of pouring from the second floor (2F) to the fourth floor (4F) of concrete structure 1. It shows where the curing is done. Next, as soon as the strength of the curing concrete in the upper part of 4 reaches a level that can support the work scaffolding framework 2, the next step is to construct the 5F part. Construction concrete hM 'rFa 'll! I 1
It is something that is raised upwards.

The scaffolding framework 2 has a height equivalent to about two stories, and has a work site 4 in five stages including the top, bottom and middle so as to divide the height into four equal parts, each with one stage from the bottom. Stage 4a, 2
Stage 4b, 3rd stage 4C14 stage 1-4d
, a 5-stage stage 4e is provided, and concrete 1-formwork 3 for constructing the upper floor is placed on the 3-stage stage 4C.
The five-stage stages 4d and 40 lack a portion that protrudes inward (towards the building).

In addition, a locking metal fitting 5 integrally fixed to the frame of the scaffolding framework 2 is provided near the first stage 4a and the third stage 4C.
There is an anchor fitting 6 attached to the wall surface of the concrete structure 1 at the corresponding position, and by fixing the locking fitting 5 to the anchor fitting 6, the scaffolding framework 2 is attached to the outer wall surface of the concrete structure 1. ing.

Now, when the upper part 4 of the concrete structure 1 has a certain degree of strength, the next step is to proceed according to the following procedure.

First, the concrete formwork 3 remaining on the upper part of the new frame is removed and placed on the work scaffolding 403 stage 4C. Then, as shown in FIG. 2, an anchor fitting 6 is attached to the vicinity of the upper end of the upper part of 4, a hydraulic jack column 7 is fixed thereto, and a hydraulic jack 8 (trade name: Hydraulic Chill Hole) is suspended from the jack column 7. Next, put the tip of the wire V9 hanging from the jack 8 to the locking fitting 5 near the third stage 4C, so that the scaffold framework 2 is suspended by the jack 8, and the lower one stage The anchor fitting 6 near the stage 4a and the support shaft 15 of the anchor fitting 6 near the third stage 4C are removed.

After that, the scaffolding framework 2 is lifted up by the jack 8.

Lift the 3rd stage 4C so that it comes close to the anchor fitting 6 of the jacking post 7 set at the top of the 4F section of the concrete 1 to structure 1, and then lift the locking fitting 5 at the 3rd stage 4C to the jacking post. Raise it so that it is slightly above the position of the anchor fitting 6. then the third
As shown in the figure, the anchor fittings 5, which have come to the corresponding positions of the anchor fittings 6°6 near the third stage 4C and the first stage 4a, which are the middle and lowest stages of the scaffolding framework 2, engage with each anchor fitting. The supporting shafts 15 are set on the shafts 6, 6, the scaffolding framework 2 is lowered by the above-mentioned lifting amount, and the upper and lower locking fittings 5 and the upper and lower anchoring fittings 6 are engaged and connected. In addition,
The load of the scaffold framework is supported by the upper anchor, and the lower anchor only acts as a steady rest, so the distance between the upper and lower locking metal fittings should be made slightly smaller than the distance between the upper and lower anchor metal fittings ( (Refer to the positional relationship of the locking metal fittings in Fig. 4) Next, remove the tip of the wire 9 from the locking metal fitting 5 at the third stage 4C, wind up the wire 9, and connect the jack branch 7 and the hydraulic jack 8. Remove it, move the concrete formwork 3 horizontally, and move it to the 5th floor of concrete structure 1.
The formwork 3 is set to construct the structure corresponding to the part, and the lifting work of the scaffolding framework 2, concrete formwork 3, and work scaffolding 4 is completed. In order to reduce vibration during lift-up, a horizontal guide arm 22 is attached to the anchor fitting 6, and a notched steel pipe is attached to the tip of the arm to form a horizontal guide 23. 2a. However, lift-up work
Since this is not done during strong winds, there is no need for special reinforcement of the building site.

A chain block is also sufficient in place of the hydraulic jack 8, and there is no need to use a tower crane or the like at all.

Below, the method for constructing the concrete structure described is RNh.
The locking fitting 5 and the anchor fitting 6 are shown in FIG. 4 and below.

Locking fittings 5 are attached to both ends of the scaffolding framework 2,
Anchor bolts 10 for attaching anchor fittings 6 are buried in the concrete structure 1 at corresponding positions. A Siebold is used so that the tip of the anchor bolt 10 does not remain outside the wall surface, and the Siebold is also removed when the anchor fitting 6 is removed from the covering surface of the concrete structure 1.

The locking fitting 5G is a plate-like body, and a notch cut upward from the lower side forms a guide notch 11 extending from the center of the side surface of the plate-like body toward the lower side.

The anchor fitting 6 has two supporting pieces 13-13 that stand parallel to each other on the base plate 12, and these two supporting pieces 13-13
A bolt hole 14-14 is formed at approximately the center of each side surface of the shaft, a bolt is passed through the hole, and the shaft is secured with a nut to form a support shaft 15.

In addition, a U-shaped notch-shaped support groove 16-16 is installed from the upper side of the support piece 13-13, and is roughly extended from each upper and lower end of the inside of the support piece 13-13 in each vertical direction. The extended guide pieces 17-17 are aligned.

The support groove 16-16 serves to receive the support shaft of the hydraulic jack column 7.

By the way, the wire 9 of the hydraulic jack 8 is pulled to the locking metal fitting 5! 3, a connecting hole 18 for connecting a shank or the like provided at the tip of the wire 9 is formed through the locking fitting 5 relatively above.

Figure 8 shows the condition of the hydraulic jack 8, locking fitting 5, etc.

A horizontal locking pin 19, which is a supporting axis for supporting the jack branch 7, is placed in the support groove 16 of the anchor fitting 6 attached to the top of the 4F portion of the concrete structure/object 1, and the branch 7 is attached to the anchor fitting. Support with 6. That is, the locking pin 19
The support column 7 can be rotated slightly in the direction of the concrete 1-structure 1 or in the direction of the scaffolding framework 2 using the axis of rotation.

In order to adjust this rotation angle to A, two pieces of 19120-20a were used.
is interposed inside the lower end of the jack post 7 (on the structure 1 side).

This is to adjust the inclination angle of the jack support t↑7, which has the locking pin 19 of the jack support post 7 as its rotation axis. tilts toward the frame (structure 1 side), and conversely, when the model 20-208 is handled, it tilts toward the scaffolding framework 2. The angle of inclination can be finely adjusted by adjusting the driving depth of the wedge 2O-20a. In addition, adjustment of the column in the left-right direction (direction parallel to the wall surface) can be done by placing the lower end surface of the column 7 on the upper end of the erection adjustment bolt 24-24 whose mounting number is attached to the horizontal plate 6a of the anchor fitting 6. Let's do it.

To attach the hydraulic jack 8 to the jack post 7, remove the support shaft 15 of the anchor fitting 6 from the support piece 13-13, and insert the support piece 7-7 into the support piece 13-13.
The locking pin 19 may be accommodated within the support groove 16-16. The angle of inclination to the front and back is P! ! Adjust with 2O-20a. The hanging hook of the hydraulic jack 8 is hung on the upper end of the column 7 supported by the anchor fitting 6 in this manner.

A hanging point shackle 21 attached to the tip of the wire 9 of the jack 8 is connected to the M connection hole 18 of the locking fitting 5 with a bolt.

In the above manner, the jack 8 is operated and the vehicle 21 is
When the locking metal fitting 5 at the third stage 4C is raised, the lower side of its guide notch 11 is open, so it separates from the support shaft 15 of the anchor metal fitting 6, and the scaffolding framework 2 is lifted by the jacks 8. It rises directly above.

When raised further, the locking metal fitting 5 reaches the anchor metal fitting 6 that supports the jack post 7 on two sides. When it rises further, the guide piece 17 is placed between the support pieces 13-13.
-17 and fits between the supporting pieces 13-13. Therefore, as described above, the support @15 is set in the bolt hole 14 to support the load of the scaffolding framework.

(Effects) As described in detail above, according to the method for constructing a concrete structure according to the present invention, a small lifting machine that can be freely connected to and detached from a concrete structure is pivotally supported by an anchor fitting that can be attached to and detached from a concrete structure.
, this will raise the scaffolding framework along with the formwork,
There is no need to use lifting equipment such as tower cranes to lift and support reinforcing bars, steel frames, and construction materials on site. therefore,
The burden of lifting plans will be reduced, and together with on-site stockyard problems, the work flow will become more efficient.

Furthermore, the support for lifting the scaffolding framework can be carried and moved by the worker, making it easier to lift up the support, thereby reducing the burden on the worker of lifting the scaffolding framework.

Further, according to the support member according to the present invention, the locking metal fitting is provided with a guide notch, and the anchor metal fitting can be easily removed by simply moving vertically upward from the removable support shaft.
When engaging, it is only necessary to move from vertically upward to downward. Therefore, the scaffolding framework can be engaged and disengaged by vertical movement, which is convenient when the scaffolding framework is moved up and down by a mobile device that does not have a movement function in the front, rear, left, and right directions.

The anchor fittings have a U-shaped support groove cut out from the top, so the support for the mobile lifting VT can be placed on the top or on the 6j.
! 'L, can be installed by simply inserting it, and can be easily pivoted for rotation. This not only makes it possible to insert and adjust the support when the precision of the frame and base plate is poor, but also to give a slight longitudinal inclination angle to the lifting machine, which has no turning ability but only lifting ability. This will lead to an improvement in In this way, since the anchor metal fittings serve both to support the pillars and to support the scaffolding frame 11, there is also the advantage that the number of anchors to be installed can be reduced.

Furthermore, the anchor fitting has two supports r installed in parallel.
; Since the guide pieces are provided at both the upper and lower ends, the locking metal fitting can be easily guided to a predetermined position of the anchor metal fitting, and various effects are achieved as described above.

[Brief explanation of the drawing]

Figures 1 to 3 are side views showing the side of the 8x in order to explain the embodiment of the method step by step; Figure 4 is a side view showing the supporting state of the scaffolding framework; Figure 5 is a side view showing the supporting state of the scaffolding framework; A cross-sectional view showing the engaged state of the anchor metal fitting and the locking metal fitting, FIG. 6 is a view taken from the direction of arrow A in FIG. 4, and FIG. 7 is a view taken from arrow A shown in FIG. 8 is a side view showing the situation when lifting up the scaffolding framework, and FIG. 9 is a view showing the wedge in the direction of the arrow in FIG. 8. 1... Concrete structure 2... Scaffolding framework 3...
・Concrete formwork 4...Working scaffolding 5...Locking fittings 6...Anchor fittings 7...Hydraulic shirt, support column 8...Judges 9...Wire
11...Guide notch 13...Support piece
14... Bolt hole 15... Support shaft
16...Support groove 17...Guide piece
19... Locking bottle patent applicant Obayashi Corporation Representative Patent attorney - Color
Ken Torima Patent Attorney Matsumoto! lIt
Fig. 1 Fig. 2 Fig. 4 Fig. 5 a Fig. 6 Fig. 7 Fig. 8 Procedures t1 official document (spontaneous) November 1988 Indication Patent Application No. 195677 of 1985 2, Name of the invention Method for constructing concrete structures and supporting members 3, Relationship with the case of the person making the amendment Patent applicant address 3-37 Kyobashi, Higashi-ku, Osaka-shi, Osaka Prefecture Name (
054) Obayashi Gumi Co., Ltd. 4, Agent Address: 71 Rokin Shinbashi Building, 2-12-7 Shinbashi, Minato-ku, Tokyo TEt508-0336 (Representative) Name (7)
128> Patent Attorney - Kensuke Color Address Same as above Name (8768) Patent Attorney Masatoshi Matsumoto 5, Subject of Amendment MJ8, "Detailed Description of the Invention" column 6, Specification of Contents of Amendment, Page 12 Insert the following statement between lines 17 and 18.

Claims (2)

[Claims] (1) A concrete formwork, a scaffolding framework that can support it, an anchor fitting that can be fixed to the outer wall surface of the pre-cast concrete structure, and an anchor fitting that is integrally fixed to the scaffolding framework and can be latched to the anchor fitting. Fix the anchor fitting to the top of the concrete structure where concrete has just been poured, attach the portable lifting device to this, and attach the portable lifting device to the anchoring fitting of the scaffolding framework. The lifting wire of the heavy machinery is locked, and then the scaffolding framework with the concrete form is lifted up as far as necessary to the next concrete placement position, and the locking metal fittings of the scaffolding frame are connected to the anchor metal fittings. The lifting machine is then removed from the anchor fittings, the concrete formwork on the scaffolding framework is placed in a predetermined position on the upper floor of the existing concrete structure, concrete is poured, and the concrete structure is constructed by repeating these steps. A method of constructing a concrete structure characterized by sequentially constructing the concrete structures upward. (2) The support member for supporting the scaffolding framework on the outer wall surface of the concrete structure is characterized by comprising the anchor fitting and the locking fitting, and having the following constituent requirements. (a) The locking fittings shall be integrally fixed to the side ends of the scaffolding framework. (b) The locking metal fitting has a guide notch that gradually expands downward and opens downward. (c) The anchor fitting has a bolt hole that can be freely attached to and detached from an anchor bolt installed in the concrete structure. (d) The anchor fitting is provided with a support piece that projects in a direction away from the outer surface of the concrete structure. (e) The support piece of the anchor fitting is removably provided with a support shaft that locks in the guide notch of the locking metal fitting and supports the locking metal fitting. (f) A guide piece is provided inside the support piece of the anchor metal fitting to guide the locking metal fitting to the inside of the support piece. (g) The anchor fitting should be provided with a U-shaped support groove cut out from above in order to rotatably support the column of the lifting machine.